Enforcing quote format with black in develop.

tests/config/test_services.py

@@ -131,20 +131,20 @@ def test_requires():
 
 
 def test_constructor():
-    c1 = Container(foo='foo', bar='bar')
+    c1 = Container(foo="foo", bar="bar")
     assert 2 == len(c1)
 
-    c2 = Container({'foo': 'foo', 'bar': 'bar'})
+    c2 = Container({"foo": "foo", "bar": "bar"})
     assert 2 == len(c2)
 
-    assert c1['foo'] == c2['foo']
-    assert c1['bar'] == c2['bar']
+    assert c1["foo"] == c2["foo"]
+    assert c1["bar"] == c2["bar"]
 
     with pytest.raises(ValueError):
-        Container({'bar': 'bar'}, foo='foo')
+        Container({"bar": "bar"}, foo="foo")
 
 
-@pytest.mark.parametrize('services', [None, {}])
+@pytest.mark.parametrize("services", [None, {}])
 def test_create_container_empty_values(services):
     c = create_container(services)
     assert len(c) == 2